93 Accord DX - Rear speakers?

The 93 DX's come stock with only 2 front speakers and no rear speakers. There are no cutouts for rear speakers, although the mounting holes are under the carpeted-cardboard thing behind the rear seats.
Is the wiring there for me to put rear speakers in, assuming I could find a way to mount them? Is that carpeted-cardboard piece replacable?

Thanks!

Yep and Yep. The wiring is there fo yo speakers. And that cardboard piece is xactly what it sounds like: Cardboard. If you did mess it up, its not to hard to get a new piece and do it yourself. Or, maybe get it from a junkyard....i dunno but maybe get the cardboard piece from an LX which has the speaker cutouts...should fit.